Method and apparatus for making paper strips with thinned edges



1, 4, 7 1927' J. G. JONES 63 99 METHODAND APPARATUS FOR MAKING PAPER STRIPS WITH THINNED EDGES Filed April 1924 Patented any a, rear.

earns JOHN G. JONES, OF ROCHESTER, NEW YORK, ASSIGNOR TO EASTMAN KOD a. COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION QF NEW YORK.

METHOD AND APPARATUS FOR MAKI ING EAIER STRIPS WITH TEINNED EEG-E13.

Application filed. April 2, 1924-.

This invention relates to an apparatus and method of making paper strips having thinned edge portions used particularly in photographic film spools as a film protecting covering. The present invention is an im: I provement over the apparatus and method for making paper strips, shown in my co pending application, March 23, 1922.

One object of this invention. is to provide a process by which long paper strips with thinned edges of accurate widths may be obtained; another object is to provide a suitable machine for carrying out the process; 'another object is to provide a machine with which a preferred form of thinned paper edge may be produced in a single operation; and other objects will appear from the following description, the novel features being pointed out in the claims at the end of the specification.

In the drawings wherein like reference characters denote like parts throughout:

Fig. 1 is a side elevation, with parts shown in section, of amachine' constructed in accordance with and embodyin my invention; Fig. 2 is an enlarged detail plan view of the paper-grooving and slitting mechanism; Fig. 3 is an enlarged part section and part Serial No. 546,114, filed 552 side elevation of the mechanism shown in Fig. 2;

Fig. 4c is a diagrammatic showing of a section of the main .paper sheet cut into a plurality of small paper strips and Fig. 5 is a greatly enlarged fra entary detail showing the thinned edge 0 a paper strip made on my machine.

In the present embodiment of my invention I draw a paper strip from a supply roll over a series of guides which lead the paper through a definite path'to a cutting station where the paper is grooved and slotted and from which station the strips cut from the main paper strip are wound into separate rolls supports upon an upright 2 a turtle back 3. A. bracket 4 supports the supply roll 5 of paper and the main paper strip 6 is drawn from this supply roll over the guide roller 7 and guide rollers 8 which form a part of the turtle back 3 and may be of any wellknown construction. The sides or flanges 9' of the turtle back guide the paper strip 6 through r a definite path. From the last roller 8 the Serial No. 203,724..

paper strip is drawn over a series of snubbmg rollers 9 from-which it passes to a guide roller 10 and is then looped about a support- 1ng roller 11 which, as shown in Figs. 2 and 3, 1s grooved at 12. The paper supporting surface of roller 11 is interrupted at intervals 12 which are spaced to correspond with the spacing of the slots 13, (Fig. 4.) which are made in. the main paper strip 6.

After passing from the paper supporting roller 11 the paper strip is drawn about an Idler 12" and then over a second paper supportmg roller 11 which is similar to the roller above described and is then passed about a guide roller 10. From this guide roller the paper strips pass over idlers 1a and 15 and the severed strips 16 and 17 are wound into rolls 18 and 19 supported by brackets 20 and 21 which are carried by the base 1. ll provide two sets of paper supporting rollers 11 because by doing this the abrading wheels 22 may be staggered. so that y the spaclng and consequently the width of the severed strips can be made relatively narrow by this means. Where the severed strips are to be of considerable width one set of abrading wheels and paper supporting rollers may be omitted.

It will be noted from Figures 2 and 3 that the paper band 6 is bent about the axis 23 of the rollers 11 so that the abrading wheel 22 which may have a beveled face 24 will contact with and out through the paper strip at a point where the paper strip is not supported by the roller 11. This permits the paper being abraded by the wheel 22 to bend slightly inwardly as the groove and out are being simultaneously made so that the fibers 25 of the paper appear to be partially pulled out and partially cut by the abrading wheels. ea

In the enlarged view inFig. 5 the thinned edge 26 of the paper is shown with the fibers 25 extending from the grooved edge. This view is intended to show the thinned edge as it appears under a high power magnifying The machin on i t if b 1 hi h glass. lln practice l find that a beveled por.

mounted upon carriages 30 which are mountedupon the main frame and can be moved in any desired direction. These wheels are preferably carried by shafts 31 which are power driven by belts 32 which pass about pulleys 83 carried by the shafts and pulleys 3 1 which are power driven by a main drive shaft 85. e

The power drive for the take-up rolls 18 and 19 is not shown as it may be of any approved type or as shown in my copending application above referred to.

It is obvious that the process herein de scribed may be carried out in a number of diflerent ways and that the machine which I have shown as a preferred embodiment may be varied in structure. I contemplate as within the scope of my invention all such modifications in the process and in the machine as may fall within the scope of the following claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. Themethod of making a paper strip with a thinned edge including grinding an unsupported portion of a paper strip, the grinding being continued until the paper is severed.

2. The method of making a paper strip with a thinned edge including bending ,a paper strip, supporting a portion otsaid strip in bent position, and leaving a portlon thereof unsupported and grooving the paper while in the bent position at that portion where the bent strip is unsupported.

3. The method of making a. paper strip with a thinned edge including bending a, paper strip about an axis, leaving a portion of the paper unsupported and grooving the paper at the unsupported portion on a line transverse to theaxis.

l. The method of making a paper strip with a thinned edge including bending a paper strip about an axis and leaving a portion of the paper so bent unsupported, and grooving the unsupported paper.

5. The method of making paper strips with thinned edges consisting of passing a paper strip along a path, progressively supporting separated areas of said paper at a station along said path and abrading through unsupported areas of the paper asit passes said station.

- 6. The method of making paper strips with thinned edges consisting of passing a paper strip along a path, progressively supporting separated areas of said paper at a station along said path and abradifig V- shaped grooves through the unsupported areas of the paper as it passes said station. 7. The method of making paper strips with thinned edges that comprises disposing a strip of paper under tension across a groove disposed longitudinally of the paper and essee? abrading the paper thus disposed along a line over the groove until the paper is severed.

8. The method of making a paper strip with a thinned edge which comprises severing the paper by making a groove therethrough progressively from one face thereof to the other, and creating tension in the paper transverse to the groove during the making of the latter by. applying supporting forces to one face of the paper at areas on'opposite sides of the groove and separated therefrom and applying a bending force in said groove opposite to said supporting forces, the base of the groove being made wider as its depth increases until severing takes place.

9. In a machine of the class described, a support for guiding paper past a station, said support having grooves lon 'tudinal of the path of the paper, means or drawing a strip 01' paper under tension over said grooved support, and abrading means positioned to groove and sever the paper as it is held taut over the grooves.

p 10. In a machine of the class described, a support for guiding paper past a station, said support having grooves lon 'tudinal of the path of the paper, means or drawing a strip of paper under tension over said grooved support, and an abrading roller adapted to be rotated in contact with the paper opposite the groove, the roller having a greater diameter at the center than at the edges, thereby forming a groove in the paper and severing it along said groove.

11. In a machine of the class described, means for guiding a paper strip through a definite path, a supporting roller adapted to support the greater portion of a paper strip and to leave portions of the paper strip unsupported, a grooving device positioned to contact with an unsupported portion of the paper strip to groove and sever the paper strip into strips having thinned edges.

12. In a machine of the class described, means for guiding a main paper strip through a definite path, a paper supporting device adapted to bend the paper and to leave a portion of the paper unsupported at the bend, and a grooving device adapted to contact with the unsupported bent aper to thin the edge of a strip severed main paper strip.

13. In amachine of the class described, a plurality of paper guides for directing a main paper strip through a definite path, a paper supporting roller having portions of the paper supporting surface interrupted at intervals, means to guide the paper strip and bend it about the supporting roller, and grooving Wheels adapted to contact with the bent unsupported paper lying over the interrupted paper supporting surface.

14. In a machine of the class described,

rom the means for guiding a main paper strip through a definite path, a supporting roller having an interrupted surface around which the main paper strip is drawn, a second supporting roller similar to the first but spaced therefrom for carrying the paper strip, a

' plurality of abrading wheels arranged in staggered relation and adapted to contact with paper supported by the rollers, the

through portions of the main paper sheet lying over the interrupted portions of the rollers surfaces.

Signed at RochesterQNew York this 26th day of March, 1924:.

' JOHN G. JONES. 

